Draft-rigging for railway-cars.



I. OGONNOR,

DRAFT RIGGING FOR RAILWAY GARS.

APPLIU-ATIOT FILED MAR. 29, 1907.

Pateued Nov. 14, 191 1.

2 SHEETS-SEEET 2.

JOHN F. OGONNOR, OF CHICAGG, ILLINIS, ASSIGNGR, BY MESES'SSEGNMNTS" WILLIAM H. MINER, GF CHICAGQ, ILLNOIS.

Specification of Letters Patent. Patjegnd lilnt'f, f, 'lfl,

Application :filed March 29, '1907. Serial Ille.' 365,5522- To all whom it may concern:

Be it known that I, JOHN F. OCoNNon, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and usew ful Improvement in Draft-Rigging for Railway-Cars, of which the following is a specification.

My invention .relates to friction draft rigging for railway cars. Its object is to provide a friction draft rigging of a strong, simple, efficient, safe, reliable and durable construction, having a direct acting spring in' tandem with the friction devices and cooperating therewith, and in which the wedging faces of the friction bloclts or devices will not stick or cause the friction devices to act irregularly and uncertainly.

My invention consists, in connection with the draw bar, draw-bar strap or yoke, followers, stops for the followers, direct acting spring in line with the draw bar, a longi tudinally movable friction shell having an vinternal friction face parallel to the draw bar, and a plurality of sliding friction blocks having external friction faces parallel to the internal friction face of said shell and in vsliding frictional engagement therewith, and providedwith inclined or Wedging meeting faces, and a yielding fiat sheet or plate member, preferably of leather, rubber, fibrous fabric, or other like-slightly yielding material, interposed between the meeting inclined or wedging faces of the friction blocks or devices to prevent the same from sticking, and thus to cause the friction devices to act with certainty,regu

larity and reliability.

It also consists in the novel construction of parts and devices and in the novel combination of parts and devices herein shown and described.

In the accompanying. drawing, forming a part of this specification, Figure l is 'a side elevation, partly in central vertical section, of a friction draft'rigging embodying my invention; Fig. 2 isa plan view, partly .in central horizontal section; Fig. 3 isa `cross section on line 3 3 of Fig. l; Fig. 4

is a detail vertical longitudinal section of one of the friction blocks; Fig. 5 is a detaily cross section .on line 5 5 of Fig. 2, and F 6 is a detail face or plan view of the yielding member, sheet or plate, which is int-en.

. having posed between the inclined or wedging faces of the friction blocks.- l

In the drawing A. represents `the center sills or frame members of the car to which the draft rigging is applied or secured, and' A1 the front or end sill.

B is the draw bar and B1 the draw bar strap or yoke, C C the followers, D D1 the side plates or stopcastings having front and rear stops or shoulders l d1. for the followers to abut against, and alsopreferably intermediate stops d2 @Z3 tolimit lthe longitudinal movement of the followers.

E is the direct acting spring of the draft rigging in line with the draw bar, the same side it. y

F is a longitudinally movable lfriction shell having a longitudinally extending internal friction face f parallel With'the draw bar, and G G1 are sliding or longitudinally movable friction blocks or devices fitting .inside the friction shell F, and having expreferably a smaller spring El in' ternal friction faces g/ parallel to and in slidingv frictional engagement with theinternal friction face ,f Aof the friction shell F. The friction blocks or devices G G1 have inclined or wedging meetingy faces g1 to force the friction blocks into close frictional engagement with' the friction shell under action of the draw 'bar and the direct acting draft rigging spring E Vin respect to which. the friction blocks are arranged in tandem.

H is the yielding sheet or plate member interposed between the meeting inclined or 4wedging faces of the friction blocks cr devices G G1, the same being preferably of' leather, rubber, fiber, fabric, or other slightly yielding material which will op-A erate to prevent the inclined or w'edging faces of the friction blocksfrom sticking and .thus causing the friction blocks andA friction shell, or other equivalent friction devices employed, to act irregularly and uncertainly. ,l y

The longitudinally movable friction shell Fis closed at one end, preferably at the rear end,n by a flanged head or thimble F1,

vpreferably secured to the shell by rivets f1.'v And this shell F is firmly supported and guided., and prevented from turning by a saddle F2 having lateral guide flanges F3, which tit and rest upon the lower removable guide or bottoni plate G2, which is preferN ably secured to the stationary frame Work v of the car'by bolts G3. The saddle F2 is secured to the frict-ion shell F by rivets f1 some of which preferably extend through` 5 the head or thimble F1. lThe friction blocks G G1 are preferably movably connected together o r held in their assembled position 4by a rod G4 which extends 'through tapering holes g3 extending l0 longitudinally through the friction blocks` G G1. f, The interposed yielding sheet plate or member H is furnished with a central hole h through which the connecting bolt G2 extends. To prevent the friction blocks or devices G G1 from turning in the friction shell, the lower friction block G is furnished with a longitudinal groove g4 in which fits the head f3 of one of the rivets f1'by which the friction shellAF is connected to its sadile F2. This ,guide groove and rivet thus constitute simply guide devices to permit the friction shell and block to slide or reciprocate in respect to' each other While preventing them from turning.

l j The plate H of leather, rubber, fiber, or

other yielding or resilient material should preferably be from one-fourth to one-half inch in thickness, depending upon its density and solidity or compressibility. And it opcrates to permit a slight limited movement ofthe friction blocks G and G1in respect to each other without necessitating any sliding. movement of their inclined faces on or against the contacting faces of the plate H;

as the yielding material of the plate will itself initially give sufficiently in the 'direction of the plane of the plate to partially -accommodate the required spreading or separating movement of the blocks /G and G1 44t) and to transmit or transfer the longitudinal thrust of the draiv-baragainst the friction blocks -G and G1 into a-transverse pressure between the external friction faces of the blocks G G1 and internal friction face of the 45' friction'shel-l F. And as the plate H is ofl 'f vyielding material and separates the inclined or Wedgingfaces of the friction blocks, it eft'ectually prevents the sticking of said faces together as Well as from their sticking or being v,held immovable in respect to the interposed plate H itself,the yielding of the material 'of the plate H itself permitting an initial movement. I thus effectively overcome or avoid all tendency of the Wedging faces of the friction blocks or devices to ".stick. And by reason of the resiliency of the leather or rubber material of the plate H, when the load is released it tends to restore itself to its-original volume or normal position and thus initially release-the friction blocks G G1 from any sticking contact -with the friction shell F, and this without the necessity of the wedging faces of the friction blocks G G1 having any initial sliding movement on the contacting faces of the interposed plate H.

l. In a friction draft rigging, the combination with a'. draw bar, draw bar yoke, front and rear followers, a direct acting spring vin line with the draw bar, and stops for the followers, of avlongitudinally movable friction shell having an internal fricJ tionface, a pluralityfof coperating sliding friction blocks having external friction faces lparallel to and in sliding frictional engagement with the internal face' of said shell, said friction blocks having Wedging faces, a plate -of yielding material interposed between the inclined or Wedging faces of said friction blocks to prevent the same from sticking in respect to each/other and acting irregularly and uncertainly and a connecting bolt extending through the fricvtion blocks and said interposed plate of yielding material, substantially as specified.

2. In a friction draft rigging, the combination With the draw-bar and spring, of a friction shell, friction blocks within the shell having wedging faces, of a plate of leather interposed vbetween the Wedging faces of the friction blocks and extending atan angle to the draw-bar and the axis of the friction shell, said interposed leather plate coacting lwith said friction blocks to prevent their sticking in respect to .earch otherJ substantially as specified.

' 3. In al friction draft rigging, the combination with a longitudinally movable friction shell, sliding friction blocks Within the shell having .Wedging faces, and a resilient plate interposed-between the Wedging faces of the friction blocks and extending at an angle to the dravbar, and the axis of the friction shell to prevent said faces from sticking in respect to each other, substantially as specified. l

JOHN F. @CONNOR "Witnesses:

EDMUND Ancocx, H. M. MUNDAY. 

